Radio receiving apparatus



ul 1 A J 9 927 F. A. KOLSTER RADIO RECEIVING APPARATUS Filed June 24. 1926 2 Sheets-Sheet 1 INVENTQR,

ATTORNEY July 19, 1927.

v 1,636,570 F. A. KOLSTER RADIORECEIVING APPARATUS Filed June 24. 1926 2 Sheets-Sheet 2 V IN VEN TOR.

Patented July 19,1927. i 1,636,570 UNITED STATES PATENT OFFICE.

FREDERICK A. KOLSTER, OF IPALO ALTO,'CALIFOBNIA, ASSIGNOR TO FEDERAL TELE- GRAPE COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION CALL IOBNIA.

RADIO RECEIVING AIPABATUS.

Application fled Jane 84, 1928. Serial No. 118,247.

My invention relates broadly to radio partially brol ren away of thebracket and receiving apparatus and more particularly sleeve mounting by which shdable moveto a loop antenna system for radio broadment of the frame of the loop may be efcast re iving's ts, fected; Fig. 7 1s a s1de elev at1on of the I One of the objects of my invention is to bracket and sleeve mounting illustrated 1n so provide a construction of loop antenna Flg- F g. 8 1s a I0S-Se0 nal vlew -which may be readily mounted with respect through the sleeve mountino on line to the cabinet of a radio receiving apparaoft Fig. 7; Fig. 9 is a detailed view showing tus and conveniently arranged with respect he pivotal mounting of the frame of the 1 to the cabinet while permitting rotative loop; Fig. 10 1s a cross-sectional new show- 05 movement of the loop for directive reception. -1ng the assembled bracket sleeve and slide Another object of my invention is to proof the loop mounting; Fig. 11 1s a cross-secvide a mounting for a loop antenna upon a ional v ew taken on line 11-11 of the radio receiving apparatus cabinet where the bracket sleeve and slide assembly shown m loop antenna is arranged for combined F g-10; and F1 12 13 show detailed 7 translatory and rotative movement for varyviews of the loc mg devices by wh1c h the ing the position of the plane of'the loop frame of the loop may be secured in 1ts for selective reception of signals broadcast extreme .position outsid of th eab t from transmitting stations located in difstructure. a

'20 f t di ti s, Heretofore m the art in employing a 75 Another object of my invention-is to proloop antenna with a radio broadcast revide a mechanical mounting for a loop an-' celver 1t has been customaryto mount the tenna of relatively large size upon the apl p antenna n a fixed position w hm H1 paratus cabinet which houses broadcast raapparatus cabinet. In this arran ement t y die receiving a paratus where the loop may has been very diflicult to secure se ective (11- be withdrawn 10m the cabinet structure to rective reception without changing the posia position where it may be rotated in dift1on of the entire cabinet. ferent planes for the selective reception of Various mechanical arrangements have signals from a particular direction. been proposed for rotating the loop within Still another object of my invention rethe cabinet structureibut space within the sides in the construction and arrangement cabinet is so limited that only a relatively of a loop antenna for a radio broadcast resmall loop may be employed which in some ceiving apparatus where means are provided instances may be inadequate for the most for mountin the loop with respect to the eflicient reception. By my invention I proapparatus ca inet by which combined slidvide a loop structure of relatively large size 90 ing and rotative movement may be imparted which may be normally housed adjacent the to the loop for adjusting the plane of the cabinet structure within the plane of one 7 loop with respect toa desired transmitting side of the cabinet and then readily restation. a I moved by translatory motion to a position so 40 Other and further objects of my invention far removed from the cabinet that rotative 95 will be understood from the specification "movement may be imparted to the frame hereinafter following by. reference to the structure for securing directive reception in accompanying drawings in which a selected direction. v Figure 1 is a front elevation partially Referring to the drawings in more detail,

broken away and section showing a fragreference character 1 designates the radio mentary portion of a radio cabinet equipped receiving apparatus cabinet structure having with the loop structure; F1 2- is a crossa horizontal bottom portion 2 on the lower sectional view taken throu the frame of side of which a block member 3 is mounted the loop on line 2-2 of ig. 1; Fig. 3 is by means of bolt members 5 which secure the 59 a view of the loo structure taken on line U shapedbracket members 6 around opposite 105 3 -3 of 1; ig. 4 is a cross-sectional sides of the-sleeve member 7. The sleeve view throng the loop structure on line 4-4 member 7 is rectangular in shape and ro thereof" F1g. 5 is a cross-sectional view vides a guide for a rectangular tube sli g taken t rough the frame of the loop upon member 11. The sleeve member 7 is agfr- Fig. 8; Fig. 6 1s a plan view hired as represented at 10 through whic a limb- "freely in the direction spring latch 9 secured to a bracket member and limlting stop 8 is arranged to protrude. The bracket member 8 is secured to the outside wall of the hollow sleeve 7 adjacent the aperture 10. The sliding member 11 is provided with instruck projections 12 in one wall thereof with which the spring latch 9 is arranged to engage for locking the sliding member 11 in its extreme pro'ecting position represented in full lines 1n ig. 1. The slidingmember 11 carries at its outer extremity the tubular member 14 disposed at right angles thereto. The tubular construction of the sliding, member 11 enables the conductors 15 from the loop 20 to pass through the aperture 21 in the loop frame 19 and connect with the terminal block 4 on the underside of the radio receiving apparatus cabinet. The frame 19 of the loop is rectangular in shape and is braced across its lower portion, as represented at 17. Bearings 16 and 18 are supported at opposite points on the loop frame between which the tubular member 14 is journaled. In order to prevent any excess play at the rotating structure, I provide fiber gasket members 16 and 18 between the ends ofthe tubular member 14 and the bearings 16 and 18. -Rotative movement of the loop may be secured through substantially 360, which is sufficient for all practical purposes inasmuch as the position of the apparatus cabinet 1 may also be varied. Felt members 22 on the frame 19 provide abutment stops for the loop when in retracted position as represented in dotted lines in F i 1 for preventing the marring of the finish of the cabinet. The housing portion of the loop frame is indicated at 19' with the turns of the loop represented at 20. In housing the loop the spring latch 9 is withdrawn from the aperture 10 enabling the abutment 12 to pass of the apparatus cabinet. Projection of the loop frame. outwardly from the cabinet structure is limited by the projection of the spring latch 9 into the apertured portion of the sliding member 11.

It will be observed that connections between the loop antenna and the radio receiving apparatus within the cabinet are preserved at all times and that a wide selection for directive reception is available by the substantially free rotative movement which may be imparted to the loop structure.

While I have described my invention in a certain preferred embodiment, I desire it to be understood that modifications may be made and that no limitations upon my invention are intended other thanare imposed by the scope of the'appended claims.

at I claim as new and desire to secure by Letters Patent of the United States is as follows: a

1. In a radio receiving apparatus including a radio cabinet, the combination of a tubular sleeve member supported with respect to said member carried a loop antenna ivotally mounted on one end of said slidahle tubular member whereby connections between said radio cabinet and said loop antenna may be established by conductors passing through said tubular member.

2. In a radio receiving apparatus includ ing a radio cabinet, the combination of a bracket member carried by said radio cabinet, a tubular member supported by said bracket member and apertured atone side,

thereof, a spring latch carried'bysaid tubular member and arranged to normally project into the apertured tubular member arranged for reci rocative motion in said tubular member, a rame for a coil antenna and a pivotal connection between said frame and the outer extremity of cabinet, 9. slidable tubular by said sleeve member and portion thereof, a slidable said slidable tubular member whereby connections may be established between said-coil antenna and said radio cabinet by conductors passing through said slidable tubular memher while said coil antenna may be rotated through substantially 360.

3. I ing a radio cabinet, the combination of a horizontal tubular bracket supported with respect to said radio member arranged for ment in said horizontal tubular bracket with substantially no rotation, a frame member, a coil antenna carried by said frame memher, a shaft member secured adjacent the outer extremity of said horizontal member, said frame member being journaled on said shaft member whereby said frame may be moved away from said cabinet and swun through an arc of substantially 360 for selective directive reception.

In testimon whereof I aflix 7 Fit n a radio receiving apparatus includcabinet, a horizontal reciprocative move 

